Remove ExtractImageRep from the browser frame header painting code.

ui/gfx/canvas.cc

Index: ui/gfx/canvas.cc
diff --git a/ui/gfx/canvas.cc b/ui/gfx/canvas.cc
index 60f0077bf96087faf204441fb6148644cb6b3b6c..7e5a2ed40f382f41902c12c64904f575ae0e9eec 100644
--- a/ui/gfx/canvas.cc
+++ b/ui/gfx/canvas.cc
@@ -198,6 +198,10 @@ void Canvas::SaveLayerAlpha(uint8_t alpha, const Rect& layer_bounds) {
   canvas_->saveLayerAlpha(&bounds, alpha);
 }
 
+void Canvas::SaveLayerWithFlags(const cc::PaintFlags& flags) {
+  canvas_->saveLayer(nullptr /* bounds */, &flags);
+}
+
 void Canvas::Restore() {
   canvas_->restore();
 }